addiction isnt something to pay 440 for. addiction is something to work on yourself or with someone who specializes in mental health.
i have experienced addiction. smart phone addiction is a mild one and its completely breakable by changing one's own habits.
people are capable of it. they're just lazy. shelling out 440 bucks for a gimmick that makes them feel like they're helping themselves doesn't seem like a healthy thing to do for one's addiction.
signal requires a phone number and won't even allow you to send sms to those that aren't on signal.
its better, but still not great.